Ultrabroad linewidth orange-emitting nanowires LED for high CRI laser-based white lighting and gigahertz communications

Bilal Janjua, Tien Khee Ng, Chao Zhao, Hassan M. Oubei, Chao Shen, Aditya Prabaswara, Mohd Sharizal Alias, Abdullah Alhamoud, Abdullah Alatawi, Abdulrahman M. Albadri, Ahmed Y. Alyamani, Munir M. El-Desouki, Boon S. Ooi

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Group-III-nitride laser diode (LD)-based solid-state lighting device has been demonstrated to be droop-free compared to light-emitting diodes (LEDs), and highly energy-efficient compared to that of the traditional incandescent and fluorescent white light systems. The YAG:Ce3+ phosphor used in LD-based solid-state lighting, however, is associated with rapid degradation issue. An alternate phosphor/LD architecture, which is capable of sustaining high temperature, high power density, while still intensity- and bandwidth-tunable for high color-quality remained unexplored. In this paper, we present for the first time, the proof-of-concept of the generation of high-quality white light using an InGaN-based orange nanowires (NWs) LED grown on silicon, in conjunction with a blue LD, and in place of the compound-phosphor. By changing the relative intensities of the ultrabroad linewidth orange and narrow-linewidth blue components, our LED/LD device architecture achieved correlated color temperature (CCT) ranging from 3000 K to above 6000K with color rendering index (CRI) values reaching 83.1, a value unsurpassed by the YAG-phosphor/blue-LD counterpart. The white-light wireless communications was implemented using the blue LD through on-off keying (OOK) modulation to obtain a data rate of 1.06 Gbps. We therefore achieved the best of both worlds when orange-emitting NWs LED are utilized as “active-phosphor”, while blue LD is used for both color mixing and optical wireless communications.
Original languageEnglish (US)
Pages (from-to)19228
JournalOptics Express
Volume24
Issue number17
DOIs
StatePublished - Aug 10 2016

Fingerprint Dive into the research topics of 'Ultrabroad linewidth orange-emitting nanowires LED for high CRI laser-based white lighting and gigahertz communications'. Together they form a unique fingerprint.

Cite this